<form id="form" action="save.php" method="post" autocomplete="off">
<fieldset>
<label>Please fill up all the form fields</label>
<section>
<label for="text_tooltip">Category Name</label>
<div>
<input type="text" id="text_field" name="category_name" required data-errortext="Category Name is required">
<span>Please enter the category name.</span>
</div>
</section>
<section>
<div>
<!-- <button class="submit" name="submitbuttonname" value="submitbuttonvalue">Save</button> //-->
<input type="submit" name="submit" />
</div>
</section>
</fieldset>
</form>